William J. Buchanan

Computer networks are a crucial part of many organisations and many users now even have a network connection in their own home. Without networks there would be no Electronic Mail, no Internet access and no Networked Applications. It is one of the fastest moving technologies and brings benefits to virtually every country in the world. With the interconnection of networks to the Internet, the world has truly become a Global Village. For many people the first place to search for a given topic is the World Wide Web.

These days virtually every computer in a company is networked and networks are key to the effective working of an organisation. Without them, few people could work ef- fectively.